Improvement in folishing-machine for polishing- wood-mouldings



ilrttiil time @met (ltjjiiw.

- ment in Machines for Polishing;

BENNET PERRY, Ol" BRIDGEPORT, CONNECTICUT.

Letters Patent No. 90,296, dated May I8, 1869.`

The Schedule referred to in these Letters Patent and making part of the same,

To all whom fit 'ma/y concern.-

Be it known that I, BENNET C. PERRY, ofthe city of Bridgeport, in the county of Fairfield, and State cf Connecticut, have invented a new and useful Improveclare, that the following is a full, clear, and exact description ofthe construction, character, and operation of the same, reference being had to the accompanying drawings, which make part of this specification, in whichy Figure l is a perspective viewof the whole machine, showing the surface for polishing one shape of the mouldings, the circles which secure it in its place, one of the set-screws which adjust the work-table, and two segments of the India-rubber circle.

Figure 2 is across-section of the periphery of the circle of India rubber, with a .dat fac Figure 3 is a crosssection of the curved surface of the periphery for polishing mouldings.

My improvement consists in forming the\periphery or circular surface of the polishing-wheel of vulcanized India rubber, tp be coated or covered with any suitable, polishing-substance suited to polish either a dat snrface or any and every variety ot' curved surfaces known by the namerof mouldings, on wood, metal, stone, 85e., and in iitting to the frame, near the periphery of the wheel, a suitable work-table, resting on set-screws,

so that it may be adjusted to any desired pitch or angle to the periphery of the polishing-wheel, and thereby enable me to polish a surface, an edge, or a corner, at any desired angle or surface-conliguration.

I make the frame of wood, or any other suitable material, of posts and rails, or beams, in the ordinary way, as represented at A A, B B, Sto., ina proper manner to sustain the` polishing-wheel C O and worktable D. A

I make the main portion of the polishing-wheel of cast-iron, or any other suitable material, in the form of a circular rim or web, as indicated at O C, with suitable arms or spokes, as indicated at a a, 85o., and a suit-able hub or nave, E, so that it may revolve on a vertical shaft, Zi b, properly stepped, as represented at c.

I make the upper rim or binding-circle GG of castiron, or any other suitable material, of the same diameter as the lower part C C, and of suitable strength to iirmly hold the India1ubber circle in its place for polishing, and with arms projecting inward or towards the centre, as represented at d d, Snc., of the same number, and in the same relative position as the spokes a a, Sac., by means of which I secure it to the lower rim UU by screw-bolts i i, che., which pass through the arms or spokes c a, Sto., and arms, d al, tc., which I hold in place bythe nuts e e, Snc., above the projecting arms d d, 85o. And, to give the ring G G the desired pitch in all its parts, I4 tit graduating thu1nb-screws, as fj; Snc., which work on the spokes and I do hereby dea a 85o., to `adjust the rim and cause it to bear properly A on the dovetail.

I make the central orV polishing-portion F of the wheelof vulcanized India rubber, moulding it in any convenient number of pieces, with a dovetail ou the back or inner side, as represented in perspective at g g', iig. 1, and in cross-section at g g, figs. 2 and 3, to iit or be firmly held between the two rims C C and G G, as indicated at G', fig. l(

And I make the front or outer surface, to which the polishing-material is to be applied, flat, as represented in section at It, iig. 2, and in perspective at h., iig. l, to render it suitable for polishing fiat surfaces, whethe, it be the edge, the end, or the broad side of a board or any other'article.

0r, I mould the gum on any desired form or moulding-surface, as represented in cross-section at F, iig.-

3, and in perspective in tig. I, or according to any other pattern desired. t

Having made the two metallic rims C O and G G, with their appendages, and cast or moulded the pieces of rubber, substantially as described, I place the dovetail portions g of the pieces of the India rubber onto the upper edge of the lower rim C C, fitting the ends of the pieces so as to form a full and smooth surface to operate, and place the upper-rim G G above and on to the dovetail portions g of the rubber, pass the screw-bolts i fi, Sto., through the spokes a a, 85e., and

arms, d d, 85e., turn the nuts, e e, dto., and adjust the thumb-screws ff, 86e., when the rubber will be rmly secured between the two metal' rims O O and GG, substantially as represented in g. I.

I then cover the periphery of the India rubber, as represented at F, iig. l, withY a suitable polishing-substance, such as sand-paper,e1`nerycloth, or any other similar material, by glueing it on to the rubber; or I- glue paper, cloth, leather, or any other analogous material on to the periphery or circular face ofthe wheel, coat it over with glue, and then sprinkle or roll on sand, ground dint, emery, or other suitable substance, so as to give a properpolishing-surface to the periphery of lthe wheel; or the glue may be spread ou the rubber, and the polishing-substance thrown thereon; butI do not prefer that way of coating the periphery; but when coated in either way, it will be ready for use.

I make the work-table D of wood, or any other suitable material, suited to the size of wheel; and I adj ust it to any desired pitch or inclination by means of any convenient number of adjusting-screws, one of Y which is represented at H, by means yof which the peculiar bevel of the moulding may be varied at pleasure.

To use this machine, when the moulding has'been stuck on the edge or end ofa board, as represented at L, fig. I, I set the polishing-wheel in rapid motion in the direction indicated by the dart, take the board in my hands, rest it o n the previously-adjusted worktable D, bring the moulding against the polishing-snr.

face F, and move it rapidly to the left or against the motion of the Wheel, when the grit or polishing-sub ,stance on the periphery F will completely polish th moulding lit for use. Y

This wheel may be made of any desired diametrical or vertical dimensions, so as to polish any surface, and

the periphery or polishing-surface may be either flat or of any curve or series of curves, either concave or convex, so as to polish a moulding -of any desired configuration in the cross-section, or straight or curved on the edge or end, leaving the corners square, con-V vVex, or concave, and be ttedfcr the mostI rapid abrasion, or for the iine'st finish which may be desired for wood, metal, stone, glass, or other material, as the l periphery of the India-rubber circle can be cast or stuck by rims, I cannot only give it the desired form in the cross-section, with the least trouble, but can also readily fit it to a wheel of any desired diameter, as will bend or conform to any periphery; and in that its elasticity or yielding character will allow it to conform to the slight inequalities of the unfinished 'surface, and will entirely obviate or prevent the chattering and unequal motion, so common in polishing, so that it wiil quietly polish the surface smoothly, even though it should leave it slightly undulating.

VYWhat I claim as my invention, and desire to secure by Letters Patent, is

The 'combination of the vulcanized Iudia-rubbercircle, with the two inflexible rims C C and Gr G, when they are constructed, arranged, and fitted for use, substantially as herein described and set forth.

B. C. PERRY.

Witnesses C. H. PORTER, R. FITZGERALD. 

